Pressure-governor for pumps.



yaamw No. 879,709. PATENTED-FEB.18, 1908'.

H. H. WESTINGHOUSE.

PRESSURE GOVERNOR FOR PUMPS.

APPLICATION FILED 10170.13, 1902.

WITNESS I8 un rnn STATES: PATENT OFFICE.

nnunv nwn s'rmenousn, OF NEW YORK, N. Y.,'ASSIGNOR r THE WESTINGHOUSE AIR BRAE COMPANY, PENNSYLVANIA.

To all whom itimay concern:

Be it known. that I, HENRY H. WESTING- noose, a citizen of the United States, residmg in New York city, county and State of New York, have invented a certain new and useful Improvement in Pressure-Governors for Pumps, of which improvement the following is a specification.

- This invention relates to'pressure governors for pumps, and more particularly for motor driven air compressors as employed on cars for. supplying compressed air to themam reservoir of the air brake system.

Heretofore governing devices have been used to operate controlling means, such as a switch to o n and close the circuit of the "motor, for e purpose of stopping and startmg the pump according to certain maximum and minimum pressures respectively in the reservoir, said'governmg devices compnsmg a spring-pressed diaphragm or piston d to reservoir pressure and operating to admit fluidunder pressure to a iston or other means for actuating the switc i or controlling device.

When two or more cars are coupled together in a train, it is'desirable that all the ply the connecte motor-driven compressors be utilized to supreservoirs of the system and also that these compressors be all stopped and started at substantially the same time. It'is found to be impracticable to so adjust all h governors that they-will act simultaneously to operate their controlling devices or switches, and the object of invention is to provide a connecting means between said governors by which they will act substantially together, so that when one governor operates to throw its switch or controlling device a similar action of the ,plying air to the main reservoir 3, which is 'by pipes 5fwith a mo'tormans' Specification of- Letters Patent.

"Application filed December 13- 1902. Serial No. 135.077.

OF PITTSBURG, PENNSYLVANIA, A CORPORATION OF PRESSURE-GOVERNOR FOR PUMPS. V

Patented Feb. is, 1908.

valve 4 at each end of thecar. A train pi e 7 connects the motormans valves with t e brake cylinder 6, and both themain reservoir pipe and the train pipe may be provided with the usual valves an couplings for con nectirig the same with corresponding pipes of adjacent cars.

'For the purposes of illustration, I have shown a pressure governing device '19 comprising a casing having a diaphragm chamber 9 connected With the main reservoir or pump by means of pipe 8, and containing a diaphragm 10 having a stem 11 for actuating a'slide valve 12 for opening and closing the, supply and exhaust orts 13 and 14 leading to and from the cylinder 15. Inthis cylinder is located a piston 16 for operating the switch 17 of the motor circuit, and a spring 18 acts against the back of the piston for forcing the same to its inner position when the exhaustport is open.

It is ob Ions that a steam or other form ofmotor c'ouldbe used in place of an electric motor for operating the air pump, and also.

that various forms of controlling devices could be substituted for the electric switch.

According to the present form of my invention an intermediate equalizing pipe 20 is connected to the pressure cylinder 15 and is also ada ted to'be connected with similar pipes on a j acent cars by means of ordinary valved couplings between the cars.

The operation of the air brake system in applying and releasing brakes is well understood by those familiar with the art and will. not therefore be described. When each car is being operated s' y the governing device operates- 1n the usua way to cut the motor in or out by closing or opening the circuit according to the predetermined minimum and maximum pressures 'm the main reservoir,

' the equalizing pipe 20 at the time be' closed. When two or mpre cars are couple up in a train the equahzing plpes are also .coupled, thus putting all the switchoperating cylinders in comnijmication with each of the governing devices the justable springs v21 are compressed and the slide valves drawn down sufiiciently to lap the in let port 13. Since, for various reasons, as before stated, the governors cannot all be set to act at precisely the same pressure,

someone of the valves (the one having the weakest springlwill open its port 13 before the others and when this occurs air under pressure immediately flows through port 13 into cylinder 15 and from thence through equalizing pipe to all of the cylinders 15,

' thus applying sufiicient pressure to all the to the atmosphere.

pistons 16 to actuate all of them at substantially the same time to throw their respective switches 17 to open the circuit and stop the pumps. Then as the pressure in the main reservoir system diminishes owing to the ap plication of the brakes or other causes, the springs 21 force the respective valves back until ports 13 ,are again lapped. As the pressure continues to decrease the valve having the strongest spring will be the first to connect its ports 13 and 14 through the exhaust cavity and thus exhaust its cylinder 15 and, by means of pipe 20, all the cylinders The springs 18 then force their respective pistons back to their inner positions, at the same time throwing the switches 17 to closed position and starting the pumps. It will thus be seen that by means of my improvement all the pumps on a connected system such as described will be taneously to v stopped and started at substantially the same each having a motor driven air pump, a main reservoir, and a pressure operated device for controlling the pump, of a main reservoir pipe line connecting said reservoirs, a gov-,

' ernor pipe line for connectingsaid pressure operated controlling devices, and means oper- .ated by the main reservoir pressure for supplaying compressed air to said governor pipe e. '3. The combination with a plurality of 'motgr driven'pumps', main reservoirs, controlling devices for the motors, and cylinders with pistons for .pperatingsaid controlling devices, of a main reservoir pipe line connectlng said reservoirs, and means operated I by thern'ain reservoir pressure for supplying other ump.

compressed air simultaneously-to all of said I pistons.

The combination with a plurality of motor driven pumps, main reservoirs, controlling devices for the motors, and cylinders with pistons for operating said controlling devices, of a-main reservoir pipe line connecting said reservoirs, a governor pipe line leading to all of said cylinders, and means operated by the main reservoir pressure for supplying compressed air to Sfi 1(l"gOV 6IIlOI' pipe line.

5. The combination with a plurality of pumps, of a controlling devicefor each ump, a cylinder and piston for operating eac controlling device, an intermediate pipe connecting said cylinders and means actuated by the pressure at each pum for supplying om said interfluid to and exhausting same mediate pipe.

6. A pump governing apparatus compris i ing a controlling switch or device for stopping and starting the pump, a cylinder and piston for operating the same, means actuated by the pump pressure for admitting fluid to said cylinder, and a pipe connection from said cylinder to a corresponding cylinder of another governor.

7. A governing apparatus-for a plurality of motor driven pumps, comprising switches, one for each motor circuit, pistons for operating the switches, a diaphragm exposed to the pump pressure, and means. operated by thediaphragm for supplying fluid under pres sure to all of said pistons simultaneously.

8. A governing apparatus for motor driven pumps, comprising a switch for controlling the motor circuit, a cylinder and piston for o erating said switch, a valve for controlling t e supply of fluid under pressure to said cylinder, a diaphragm sub-j ectto' the pressure of the pump for actuating said valve, and a pipe-leading from said cylinder to the corresponding cylinder of another governing device for simultaneously controlling another pump. r

' 1 9. A governing. apparatus for motor driven pumps, comprising a switch for controlling the motor circuit, a cylinder'having supply and exhaust .ports and piston for o crating said switch, a slide valve for contro g said ports, a diaphragm subject to the pressure of the ump or actuating said valve, and an equ izing pipe to connect said cylinder with.

a corresponding cylinder of another governing device for simultaneously controlling 'an- IQ. he combination with an air 'pum main reservoir, brake cylindenand engineer 3 valve, of a motor for operating said ump, a pressure operated switch for contro ng the motor circuit, means actuated by reservoir.

pressure forsupplying fluid under pressnne to operate said switch, and an equalizing ipeconnection for simultaneously supplying uid governed by the pump pressure forcontrol- 'ng the pressure acting on said iston and on H. WESTINGH USE. Witnesses: v 1 v .R. F. EMEBY, JAB. BiMAoDoNALn.

5 11. A pressure govermng apparatuscomprising a main switch or controlling device and a piston actuating the same, means a corres onding iston of anot er overnor. 10

lIENR 

